Abstract
Two diagrams are proposed to ensure the advantages of geocomposite on improvement of stability, stiffness and permeability of cohesive soils. The one is to plot the increase ratio in bearing capacity against the one in ground reaction coefficient, which was obtained from the results of model footing tests in the laboratory, and the other is to correlate the change in permeability with the one in transmissibity in geocomposite before and after model footing tests. It is emphasized from two diagrams that placement of thin sand layers above and under geocomposite enables to maintain permeability and transmissibity of geocomposite as well as gives rise to marked improvement of stability of cohesive soil embankment.
